Electrical relay.



J. P. GADELL. V ELECTRICAL RELAY. APPLIOATION FILED 00129, 1907.

- Patented Oct. 18,1910.

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UN STATES PATENT OFFICE.

J'o'H'N E. GADELL, or BALTIMORE, MARYLAND, AssIeNoR, BY MEsNE AssIGNMENrs, TO THE NORTH ELECTRIC COMPANY, or CLEVELAND, OHIO, A CORPORATION 0E OHIO.

ELECTRICAL RELAY.

To all whom it may concern:

Be it known that I, JOHN F. CADELL, a citizen of the United States, residing at Baltimore city and State of Maryland, have invented certain new and useful Improvements in Electrical Relays, of which the following is a specification, reference being had therein to the accompanying drawing.

My invention relates to electrical relays and it consists in the combinations, constructions and arrangements herein described and claimed.

An object of my invention is to provide a relay for use in telephone systems and in other electrical arts in which a plurality of contacts can be simultaneously made or broken and one which has comparatively few operating parts, thereby lessening the liability of trouble from the disarrangement of the co-acting members.

A further object of my invention is to provide a relay in which a plurality of contacts is assembled in a minimum amount of space, the said contacts being mounted upon the supporting frame of the actuating magnet in such a manner as to constitute, with the latter, acompact, unitary structure.

A further object of my invention is to provide means by which the armature of the actuating magnet may be made to so act on a plurality of contact-springs as to positively effect the making and breaking of the contact points on said springs without any danger of failure of part of the springs to function properly, through any inequality in the moving force or in the adjustment of the separate springs themselves. I accomplish this object by the use of an insulating bar which is adapted to engage a whole row of contact-springs so as to cause them to act simultaneously.

A further object of my invention is to provide a relay in which the armature can be quickly removed and replaced and a ready inspection of the contactsprings can be had.

Other advantages and objects will appear in the following description of the device.

My invention is illustrated in the accom panying drawings in which:

Figure 1 is a side view showing one embodiment of my invention. Fig. 2 is a plan view, the contact-springs being removed.

Fig. 3 is a side elevation of the armature,

Showing the position of the bar. Fig. 4 is a rear elevation of the armature. Fig. 5 is Specification of Letters Patent.

Application filed October 29, 1907.

Patented Oct. 18, 1910. Serial No. 399,676.

a modification of the device shown in Fig. 3, in which the ears are integral with the return bar.

Referring to Fig. 1, an electromagnet l is provided with a core 2 having a reduced, threaded end 3, thereby providing a shoulder 1. The reduced end 4; of the core is passed through an opening in an L-shaped flux or return bar 5 and through a corresponding opening in a back plate 6, and is firmly secured by means of a nut 7, which at the same time rigidly clamps the return bar between said back plate and the shoulder 4L on the core. The return bar and the back plate both have registering perforations for the terminals 8 of the magnet-winding. Passing through an opening in the back plate 6, are the contact-springs 9 and 9. These springs are spaced apart from each other and from the return bar 5 by means of the insulating strips 10 and are secured, together with the latter, to the return bar by means of the screws 11 which clamp the springs and their insulating strips between said return bar and a retaining plate 12. The back plate 6 is provided with end flanges 13 adapted to receive a shell, not shown in the drawings, for inclosing the magnet within a dust and moisture-proof casing. The armature of the relay consists of an L-shaped member 14 provided with upwardly turned ears 15 near the angle thereof. These ears have upwardly extend ing slots 16 on one side, and constitute hooks that are adapted to engage pins 17 carried by one end of the return bar, to pivotally suspend the armature in close proximity to the end of the magnet core. It will be noted that by forming the armature in this manner it can be readily removed or replaced as desired, and the pull of the magnet keeps it in place. Loosely mounted on the end portion of the horizontal part of the armature is an elongated bar 18 provided with a. reduced upper portion 19 adapted to pass through an opening 20 in the return bar 5, and to engage the lower set of springs 9, to force the latter to contact with the upper set 9 when the armature is attracted toward the pole-piece. Resting on the return bar 5 and passing through opening 20 in the lower set of springs 9 are individual studs 21, also provided with reduced upper portions 22 which are adapted to engage the upper set of contact-springs 9 to prevent the latter from coming in contact with the lower set through any undue pressure from above. The openings 20, as well as the elongated opening 20 in the return bar, are sufliciently large to enable the free play of the studs.

The operation of my improved relay will, be readily understood from the above de scription. When the magnet 1 is energized it attracts the vertically depending portion of the armature. The outer end of the horizontal portion is raised, carrying the elongated bar 18 with it. The reduced portion 19 of the bar simultaneously engages the lower set of springs and forces them into contact with the upper set 9. The tension of the upper set of springs forces the bar downwardly, when the magnet is deenergized, thus positively effecting a separation of the armature and the magnet core agalnst any possible residual magnetism of the latter. At the same time the studs 21 prevent the two sets of springs from accidentally coming in contact.

I do not wish to confine myself to the specific construction shown herein as obviously additions and changes might be made without departing from the spirit of the invention, such as the addition of a plurality of sets of contact-springs. I therefore wish to claim all such modifications as fairly fall within the scope of the invention.

Having thus described my invention what I claim as new and desire to secure by Letters Patent of the United States is:

1. In an electrical relay, an electromagnet havingv an L-shaped, pivoted armature at one end and secured at the other end to a perforated, L-shaped return bar, parallel rows of spring contacts secured on said re turn bar and means disposed in said perforation and adapted to be actuated by said armature to cause a simultaneous closure of said contact-springs.

2. In an electrical relay, an electromagnet provided with a central core, a perforated, L-shaped return bar secured to said magnet core at one end, a pivoted armature secured on the other end of said return bar, parallel rows of contact-springs secured to said return bar and a pressure bar disposed in the perforation in said return bar and adapted to be engaged by said armature and to force one row of said springs into contact with another row.

3. In an electrical relay, an electromagnet provided with a central core, an L-shaped return bar having an opening secured to said core at one end of said magnet and having one arm extending above the latter, a pivoted armature secured on said return bar at the other end of said magnet, parallel rows of contact-springs carried by said return bar and a pressure bar loosely carried on the armature and having a reduced portion adapted to pass through said opening and to enga -e one of said rows of con? tacts to force the latter into contact with another row.

4. In an electrical relay, an electromagnet, a return bar therefor secured to said magnet at one end thereof and having an opening, a removable armature pivoted on said return bar at the other end, a plurality of parallel rows of contact-springs mounted on said return bar and means carried by said armature and disposed in said opening for effecting the simultaneous closure of said contact-springs.

5. In an electrical relay, an electromagnet, a return bar therefor secured to said magnet and having an elongated opening, an L-shaped armature having slotted ears pivotally mounted on said return bar, contact springs and means actuated by said armature through said opening for closing all of the contact-springs.

6. In an electrical relay, an electromagnet having a return bar, contact springs associated therewith above the bar, pivot pins on the bar, an armature under the bar having slotted ears adapted to engage said pins, and means carried on said armature for effecting a closure of said contact springs.

7. In an electrical relay, an electromagnet, a return bar therefor, contact-springs carried above said return bar, an armature thereunder having slotted ears, pintles on said return bar adapted to enter the slots in the ears and to pivotally suspend said armature and a universal stud or bar carried on said armature and adapted to effect simultaneous closure of said contact-springs.

8. In an electrical relay, an electromagnet, a return bar contact springs overlying and secured to said bar, an armature underlying said bar and a working connection from the armature extending through the bar into contact with the springs, together with a pin and slot pivotal connection between the armature and the bar permitting separation of the parts in a forward direction only, whereby accidental displacement of the pin in the slot will be automatically corrected upon energization of the magnet, and the armature may be removed from the bar or replaced thereon without moving or changing the relative position of the springs.

9. In an electrical relay, an electromagnet, having a straight core and a winding thereon,areturn bar extending along the outside of the winding parallel to the core and connected thereto at the rear end, contact springs mounted on the return bar, a bell crank armature and means for communicating motion therefrom to the contact spring, said armature having an inclined or cam slot pivotal connection with the return bar, and having one of its members extending substantially parallel therewith, and the other closing the free end of the magnet-core, whereby energi zation of the magnet and consequent attrac- I tion of its armature tend to maintain the latter upon its pivot, but while the magnet remains deenergized such removal may be freely efiectecl.

10. In an electrical relay, an electromagnet, contact springs, and an armature controlling said springs, together with means for supporting the armature on the magnet structure, said means adapted to positively lock the armature against displacement when the magnet is energized.

11. In an electrical relay, an electromagnet, a return bar, a bell crank armature having diagonally slotted ears cooperating with pins on the return bar, and contact sprin s in operative relation to said armature, t e slots in said armature being oblique to the direction of pull of armature on the magnet, whereby during energization of the magnet displacement of the armature is prevented, and at other times the weight of the armature and connected parts tends to maintain it in position.

In testimony whereof I afi ix my signa- 25 ture in presence of two witnesses.

S. H. EASTON, GEO. V. BOETTINGER, Jr. 

